I thought i quickly make a simple autosplitter to start/restart the timer, it may be added to LiveSplit automatically in the future, but for now you can find it directly here: https://raw.githubusercontent.com/Raqhael/Dorfromantik-Autosplitter/main/LiveSplit.Dorfromantik.asl (or as an attachment here)

Just import it in the "Edit Layout > + > Scriptable AutoSplitter".

NOTE: The AutoSplit is simply taking the Points to determine if a new game is started or finished/reset so if you place a tile at the start that does not end in you getting a point (basically placing a wrong edge on turn 1 which shouldnt really happen), the autosplit wont account for that... so always make your first tile count points if you want to use this AutoSplitter. (also if you open a old game that already is at e.g. 4k points it will instantly split to finish since it uses the points)